IP Library › Assignment 020312/0907
Patent Assignment
Reel/Frame 020312/0907

Merger

Recorded: 2007-12-31 Pages: 8
Assignor
CELANESE VENTURES GMBH
Executed: 2006-07-05
Assignee
CELANESE HOLDING GMBH
FRANKFURTER STRASSE 111, KRONBERG IM TAUNUS, 61476, GERMANY
Covered Properties (4)
Proton-Conducting Polymer Membrane Comprising a Polymer with Sulphonic Acid Groups and Use Thereof in Fuel Cells
Patent: 7,332,530 →
Application: 10/523,373 →
Publication: US 2005/0244695
Polymer Film Based on Polyazoles, and Uses Thereof
Patent: 7,795,372 →
Application: 10/525,590 →
Publication: US 2005/0256296
Proton-Conducting Polymer Membrane Comprising Sulfonic Acid-Containing Polyazoles, and Use Thereof in Fuel Cells
Patent: 7,745,030 →
Application: 10/529,993 →
Publication: US 2006/0183012
Proton Conducting Polymer Membrane Comprising Phosphonic Acid Groups Containing Polyazoles and the Use Thereof in Fuel Cells
Patent: 7,736,778 →
Application: 10/530,002 →
Publication: US 2006/0008690
Related Assignments (5)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignor's Interest Mar 23, 2005
From: KIEFER, JOACHIM; UENSAL, OEMER; CALUNDANN, GORDON
To: CELANESE VENTURES GMBH
Reel/Frame 015954/0608 →
Assignment of Assignor's Interest May 24, 2005
From: KIEFER, JOACHIM; CALUNDANN, GORDON; UENSAL, OEMER; BAURMEISTER, JOCHEN
To: CELANESE VENTURES GMBH
Reel/Frame 016272/0984 →
Assignment of Assignor's Interest Aug 24, 2005
From: UENSAL, OEMER; KIEFER, JOACHIM; CALUNDANN, GORDON; SANSONE, MICHAEL
To: CELANESE VENTURES GMBH
Reel/Frame 016909/0506 →
Assignment of Assignor's Interest Apr 12, 2006
From: UENSAL, OEMER; KIEFER, JOACHIM; CALUNDANN, GORDON; SANSONE, MICHAEL
To: CELANESE VENTURES GMBH
Reel/Frame 017471/0485 →
Assignment of Assignor's Interest Feb 11, 2008
From: CELANESE HOLDING GMBH
To: BASF FUEL CELL GMBH
Reel/Frame 020491/0582 →